Acoustic Tube
December 14th, 2004
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Acoustic Tube
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Covert Acoustic Tube Earpiece FOR Motorola Radio 2 PIN $6.99 |
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Covert Acoustic Tube Earpiece FOR KENWOOD Radio 2 PIN $6.99 |
Is it true that Ham Radio operators bounce signals off of the moon?
I know that lasers are bounced off of retroreflectors left on the moon, but why do that if ham radio operators have done it for years? Have they?
sure. this is well documented. they even have contests to see who can talk to the most stations that way. they’re been doing it for years. some hams who were using the 2.3 ghz ham band for this tuned their gear down to 2.28 ghz and listened to apollo missions.
the reason they go to all the trouble of using the apollo reflectors for ranging is to get coherent signals off the moon they can measure. ham radio signals illuminate most of teh moon, bounce off innumerable mountains and boulders, and are not all the useful for measurement by the time they get back to earth.
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Covert Acoustic Tube Earpiece FOR Motorola Radio 2 PIN $6.99 |
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Covert Acoustic Tube Earpiece FOR KENWOOD Radio 2 PIN $6.99 |
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1 PIN Covert Acoustic Tube Earpiece for Motorola Radio $0.99 |
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Acoustic tube Earpiece for Kenwood Wouxun Puxing Linton $8.99 |
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1 PIN Covert Acoustic Tube Earpiece for Motorola Radio $0.99 |
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Covert Acoustic Tube Earpiece for Motorola Visar radio $16.99 |
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Covert Acoustic Tube Earphone for Linton Kenwood Puxing $7.49 |
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Covert Acoustic Tube Earphone for Motorola Radio New $7.49 |
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Throat Vibration Mic Acoustic Tube for Motorola Radio $15.68 |
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Covert Acoustic Tube Earpiece YAESU Vertex VX160 VX180 $14.99 |
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Covert Acoustic Tube Earpiece YAESU Vertex VX820 VX920 $29.99 |
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Throat Vibration Mic Acoustic Tube for KENWOOD PUXING $15.68 |
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Covert Acoustic Tube Earpiece for Motorola GP328+ GP344 $22.85 |
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1 PIN Covert Acoustic Tube Earpiece for Motorola Radio $0.99 |
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Yaesu Earphone Earbud Acoustic Tube VX-1R VX2R VX-5R $6.99 |
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Acoustic tube earpiece for KG-UVD1 KG-689 KG-669 85K $8.60 |
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2-Wire VOX Earphone w/ Acoustic Tube for Kenwood $14.95 |
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2-Wire VOX Earphone w/Acoustic Tube for Kenwood TK-380 $19.95 |
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2-wire VOX Earphone with Acoustic Tube for Yaesu $14.95 |
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2-Wire VOX Earphone w/ Acoustic Tube for Mot Talkabout $14.95 |
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Acoustic Tube Earphone w/ separate PTT for Moto Visar $17.95 |
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2-Wire VOX Earphone w/ Acoustic Tube for Icom/Standard $14.95 |
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2-Wire VOX Earphone w/ Acoustic Tube for Motorola $14.95 |
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2-Wire Earphone w/Acoustic Tube for Motorola HT1000 etc $24.95 |
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Acoustic Tube Earphone w/ separate PTT for Talkabout $14.95 |
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2-Wire Earphone w/Acoustic Tube for Motorola GP328 Plus $24.95 |
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Acoustic Tube Earphone w/ separate PTT for Yaesu $14.95 |
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2-Wire Earphone w/Acoustic Tube for Motorola GP328 etc $24.95 |
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Acoustic Tube Headset f/ Yaesu VX-7R 6R 177 127 170 120 $19.95 |
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Acoustic Tube Earphone w/ separate PTT for Kenwood $14.95 |
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Medium Duty Headset w/Acoustic Tube for Kenwood 2-pin $29.95 |
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Acoustic Tube Earphone w/ separate PTT for Motorola $14.95 |
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Acoustic Tube Earphone w/separate PTT for Icom/Standard $14.95 |
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Medium Duty Headset w/Acoustic Tube for Motorola 2-pin $29.95 |
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Medium Duty Headset w/Acoustic Tube for Mot Talkabout $29.95 |
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Medium Duty Headset w/Acoustic Tube for Yaesu / Vertex $29.95 |
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Medium Duty Headset w/Acoustic Tube for Icom / Standard $29.95 |
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Throat-Vibration Mic for Motorola Visar w/Acoustic Tube $20.00 |
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1 PIN Covert Acoustic Tube Earpiece for Motorola Radio $0.99 |
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Throat-Vibration Mic for Icom/Standard w/Acoustic Tube $20.00 |
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Covert Acoustic Tube Earpiece for YAESU FT-10R VX-2R/3R $0.99 |
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2 PIN Covert Acoustic Tube Earpiece for Motorola Radio $1.99 |
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1 PIN Covert Acoustic Tube Earpiece for Motorola Radio $0.99 |
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Covert Acoustic Tube Earpiece FOR Motorola Radio 2 PIN $6.99 |
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Covert Acoustic Tube Earpiece FOR KENWOOD Radio 2 PIN $6.99 |
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1 pcs Replacement acoustic coil tube for radio earpiece $6.00 |
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2 PIN Covert Acoustic Tube Earpiece for Motorola Radio $1.99 |
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Covert Acoustic Tube Earpiece Motorola GP340 GP380 VOX $8.99 |
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Throat Vibration Mic Acoustic Tube Motorola GP328 GP340 $18.28 |
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Throat Vibration Mic Acoustic Tube for Motorola Radio $12.79 |
